Hi
I am trying to model a time dependent flow of a newtonian fluid in 2D. The geometry I'm using has sliding walls which cause a flow to be established. The aim of using a time dependent simulation is to gain a qualitative idea of the fluctions of the flow established. I am new to COMSOL and was just following a tutorial in which a step function is used to smoothly ramp up the velocity. I have used this to smoothly increase the speed of the walls to a predefined value and this solves fine.
My question is whether a step function is required or if a time dependent simulation can be done with the walls moving at the predefined value from the begining of the simulation and what difference this will make.
This is rather open ended so any input is appreciated
Cheers,
Finnian
I am trying to model a time dependent flow of a newtonian fluid in 2D. The geometry I'm using has sliding walls which cause a flow to be established. The aim of using a time dependent simulation is to gain a qualitative idea of the fluctions of the flow established. I am new to COMSOL and was just following a tutorial in which a step function is used to smoothly ramp up the velocity. I have used this to smoothly increase the speed of the walls to a predefined value and this solves fine.
My question is whether a step function is required or if a time dependent simulation can be done with the walls moving at the predefined value from the begining of the simulation and what difference this will make.
This is rather open ended so any input is appreciated
Cheers,
Finnian